﻿#region License
// Copyright (c) 2009 Shengmin Zhang
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.IO;
using System.IO.Compression;
using System.Text;

namespace Apprender.Utilities
{
    public static class UCompression
    {
        /// <summary>
        /// gzip compress a byte array
        /// </summary>
        /// <param name="value">the byte array to be compressed</param>
        /// <returns></returns>
        public static byte[] GZipCompress(byte[] value)
        {
            MemoryStream ms = new MemoryStream();
            GZipStream gs = new GZipStream(ms, CompressionMode.Compress);
            try
            {
                gs.Write(value, 0, value.Length);                
            }
            finally
            {
                gs.Close();
            }

            byte[] result = ms.ToArray();            
            ms.Close();

            return result;
        }

        /// <summary>
        /// gzip compress a string
        /// </summary>
        /// <param name="value">the string to be compressed</param>
        /// <returns></returns>
        public static byte[] GZipCompress(string value)
        {
            return GZipCompress(Encoding.UTF8.GetBytes(value));
        }
    }
}
